CGrammar: Correct translation of sizeof in static assertions

PBot/VERSION.pm

@@ -13,8 +13,8 @@ use warnings;
 # These are set automatically by the build/commit script
 use constant {
   BUILD_NAME     => "PBot",
-  BUILD_REVISION => 786,
-  BUILD_DATE     => "2014-09-11",
+  BUILD_REVISION => 788,
+  BUILD_DATE     => "2014-09-18",
 };
 
 1;

modules/c2english/CGrammar.pm

@@ -695,7 +695,7 @@ Static_assert:
     | 'static_assert'
 
 static_assert_declaration:
-      Static_assert '(' constant_expression ',' string ')' ';'
+      Static_assert '(' constant_expression[context => 'static_assert'] ',' string ')' ';'
           {
             $return = "Halt compilation and produce the diagnostic $item{string} unless $item{constant_expression}.\n";
           }